默认数据连接创建

创建默认数据连接有两种方式：

开机初始化（需要Settings默认数据开关是打开的）
用户从Settings UI上手动打开

一，开机default Data建立的过程：

PhoneApp在启动过程中，有好几次都会调用Dctracker的trySetupData，这个方法最终会向驱使RILJ向RILC发起SETUP_DATA_CALL。这个方法中有个重要的判断isDataAllowed来决定要不要setupData。而dataAllowed只有当收到SSTracker EVENT_DATA_CONNECTION_ATTACHED的消息后，才表示当前可以去setupData了,因为此时SIM卡也已经加载好，APN也已经初始化好。

触发trySetupData的地方，

DcTracker(constructor)-registerAllEvents->registerServiceStateTrackerEvents->EVENT_DATA_CONNECTION_ATTACHED,->onDataConnectionAttached->setupDataOnAllConnectableApns->(也就是接收到RILJ主动上报：UNSOL_RESPONSE_NETWORK_STATE_CHANGED，然后ServiceStateTracker发出network 状态发生变化，通知其他模块，比如DcTracker)
此时SIM卡已经loaded完成，data也attached。isDataAllowed为true，可以setupdata了。
KeyLogs:

05-18 14:26:29.352 D/QtiDCT-C( 2185): [0]trySetupData for APN type default, reason: **dataAttached**, requestType=NORMAL. **Data allowed, reason: NORMAL**
05-18 14:26:29.361 D/QtiDCT-C( 2185): [0]**setupData**: dc={DC-QtiDC-1: State=DcInactiveState mApnSetting=null RefCount=0 mCid=-1 mCreateTime=0 mLastastFailTime=0 mLastFailCause=0 mTag=0 mLinkProperties={LinkAddresses: [ ] DnsAddresses: [ ] Domains: null MTU: 0 Routes: [ ]} linkCapabilities=[ Transports: CELLULAR Capabilities: NOT_RESTRICTED&TRUSTED&NOT_VPN&NOT_ROAMING&NOT_CONGESTED LinkUpBandwidth>=15000Kbps LinkDnBandwidth>=30000Kbps Specifier: <0>] mRestrictedNetworkOverride=false mApnContexts={}} apnSetting=[ApnSettingV7] ä¸å›½ç§»åŠ¨ (China Mobile) GPRS, 2775, 46007, cmnet, , null, , null, null, 3, supl | hipri | default, IPV4V6, IPV4V6, true, 0, false, 0, 0, 0, 0, null, , false, 0, 0, -1, -1 gen#=1

DcTracker(constructor)->update->onUpdateIcc->EVENT_RECORDS_LOADED->onRecordsLoadedOrSubIdChanged->setupDataOnAllConnectableApns.
这个流程触发，必须是SIM加载已经ready。虽然这个时候也会触发trySetupData，但是由于此时数据还没有attached，所以就不会触发setUpData。
KeyLogs:

05-18 14:26:23.874 D/QtiDCT-C( 2185): [0]trySetupData for APN type default, **reason: simLoaded**, requestType=NORMAL. **Data disallowed, reasons: NOT_ATTACHED**
05-18 14:26:23.874 D/QtiDCT-C( 2185): [0]**trySetupData failed.** apnContext = [type=default, mState=IDLE, apnEnabled=true, mDependencyMet=true]

还有DcTracker监听到registerServiceStateTrackerEvents->EVENT_DATA_RAT_CHANGED，此时数据也没有attached，所以也不会触发setUpData。
KeyLogs:

05-18 14:26:29.346 D/QtiDCT-C( 2185): [0]trySetupData for APN type default, reason: **nwTypeChanged**, requestType=NORMAL. **Data disallowed, reasons: NOT_ATTACHED**
05-18 14:26:29.346 D/QtiDCT-C( 2185): [0]**trySetupData failed**. apnContext = [type=default, mState=IDLE, apnEnabled=true, mDependencyMet=true]

…

还有当创建NetworkFactory的时候，当条件合适的时候最终也会触发setUpData，但是对开机流程来说，都不合适。

所以完整的开机创建数据连接的流程为：
DcTracker(constructor)->registerForAllEvents->registerServiceStateTrackerEvents->DctConstants.EVENT_DATA_CONNECTION_ATTACHED->onDataConnectionAttached->setupDataOnAllConnectableApns
->trySetupData->setupData->DataConnection.bringUp->DataConnection.EVENT_CONNECT(DcInactiveState)->connect(同时将状态切换到mActivatingState)->DataServiceManager.setupDataCall->CellularDataService.CellularDataServiceProvider.setupDataCall
->mPhone.mCi.setupDataCall->RIL.setupDataCall.

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;}PhoneAppPhoneGlobalsPhoneFactoryGsmCdmaPhoneDcTrackerDataConnectionDataServiceManagerCellularDataServiceRILJRILCNetworkAgentConnectivityServiceTelephonyRegistryMobileSignalControlleronCreatemakeDefaultPhonesconstructor(new)constructor(new)利用工厂类TelephonyComponentFactory创建DcTracker对象registerForAllEventsregisterServiceStateTrackerEventsonDataConnectionAttachedsetupDataOnAllConnectableApnstrySetupDatasetupDatabringUpDcInactiveState.EVENT_CONNECTconnectsetupDataCallsetupDataCallsetupDataCallSETUP_DATA_CALLSETUP_DATA_CALLEVENT_SETUP_DATA_CONNECTION_DONE这里是将当前链接成功的数据注册到ConnectivityService,让其进行管理constructor(new)registerNetworkAgentDctConstants.EVENT_DATA_SETUP_COMPLETE通知其他第三方模块进行更新notifyDataConnectiondataStateChangedPhoneAppPhoneGlobalsPhoneFactoryGsmCdmaPhoneDcTrackerDataConnectionDataServiceManagerCellularDataServiceRILJRILCNetworkAgentConnectivityServiceTelephonyRegistryMobileSignalController

完整的KeyLog：

05-18 14:26:21.489 W/TelephonyComponentFactory( 2185): Injection jar is not protected , path: /system/framework/qti-telephony-common.jarstatvfs failed: ENOENT (No such file or directory)
05-18 14:26:21.519 I/PhoneFactory( 2185): Cdma Subscription set to 0
05-18 14:26:21.519 I/PhoneFactory( 2185): Network Mode set to 10
05-18 14:26:21.521 D/RILJ    ( 2185): RIL: init preferredNetworkType=10 cdmaSubscription=0) [SUBnull]
05-18 14:26:21.541 D/RILJ    ( 2185): Unsol response received; Sending ack to ril.cpp [SUB0]
05-18 14:26:21.541 D/RILJ    ( 2185): [UNSL]< UNSOL_RIL_CONNECTED [SUB0]
05-18 14:26:21.542 D/RILJ    ( 2185): [0002]> RADIO_POWER on = false [SUB0]
//Create GsmCdmaCallTracker
05-18 14:26:21.612 D/TelephonyComponentFactory( 2185): makeGsmCdmaCallTracker
//Create DcTracker
05-18 14:26:21.763 D/QtiTelephonyComponentFactory( 2185): makeQtiDcTracker
//init Apn on DcTracker constructor
05-18 14:26:21.784 D/        ( 2185): [0]initApnContexts: E
05-18 14:26:21.784 D/        ( 2185): [0]initApnContexts: skipping unknown type=1
05-18 14:26:21.784 D/        ( 2185): [0]initApnContexts: apnContext={mApnType=default mState=IDLE mWaitingApns={null} mApnSetting={null} mReason=dataEnabled mDataEnabled=false mDependencyMet=true}
05-18 14:26:21.784 D/        ( 2185): [0]initApnContexts: apnContext={mApnType=mms mState=IDLE mWaitingApns={null} mApnSetting={null} mReason=dataEnabled mDataEnabled=false mDependencyMet=true}
05-18 14:26:21.784 D/        ( 2185): [0]initApnContexts: apnContext={mApnType=supl mState=IDLE mWaitingApns={null} mApnSetting={null} mReason=dataEnabled mDataEnabled=false mDependencyMet=true}
05-18 14:26:21.784 D/        ( 2185): [0]initApnContexts: apnContext={mApnType=dun mState=IDLE mWaitingApns={null} mApnSetting={null} mReason=dataEnabled mDataEnabled=false mDependencyMet=true}
05-18 14:26:21.784 D/        ( 2185): [0]initApnContexts: apnContext={mApnType=hipri mState=IDLE mWaitingApns={null} mApnSetting={null} mReason=dataEnabled mDataEnabled=false mDependencyMet=true}
05-18 14:26:21.784 D/        ( 2185): [0]initApnContexts: apnContext={mApnType=fota mState=IDLE mWaitingApns={null} mApnSetting={null} mReason=dataEnabled mDataEnabled=false mDependencyMet=true}
05-18 14:26:21.784 D/        ( 2185): [0]initApnContexts: apnContext={mApnType=ims mState=IDLE mWaitingApns={null} mApnSetting={null} mReason=dataEnabled mDataEnabled=false mDependencyMet=true}
05-18 14:26:21.784 D/        ( 2185): [0]initApnContexts: apnContext={mApnType=cbs mState=IDLE mWaitingApns={null} mApnSetting={null} mReason=dataEnabled mDataEnabled=false mDependencyMet=true}
05-18 14:26:21.784 D/        ( 2185): [0]initApnContexts: skipping unknown type=7
05-18 14:26:21.784 D/        ( 2185): [0]initApnContexts: skipping unknown type=9
05-18 14:26:21.784 D/        ( 2185): [0]initApnContexts: apnContext={mApnType=emergency mState=IDLE mWaitingApns={null} mApnSetting={null} mReason=dataEnabled mDataEnabled=false mDependencyMet=true}
//Update ImsPhone
05-18 14:26:21.886 D/Phone   ( 2185): updateImsPhone mImsServiceReady=true
//Create ImsPhoneCallTracker
05-18 14:26:21.887 D/TelephonyComponentFactory( 2185): makeImsPhoneCallTracker
//Register NetworkFactory to ConnectivityService, which will triggle trySetupData, but will failed in this case.
05-18 14:26:21.904 D/TelephonyNetworkFactory[0]( 2185): Registering NetworkFactory
05-18 14:26:21.905 D/ConnectivityService( 1407): Got NetworkFactory Messenger for TelephonyNetworkFactory[0]
//Notify SSTracker to notify DcTracker the data attached.
05-18 14:26:29.210 D/RILJ    ( 2185): [UNSL]< UNSOL_RESPONSE_NETWORK_STATE_CHANGED [SUB0]
05-18 14:26:29.210 D/NRM-C   ( 2185): onNetworkStateChanged
05-18 14:26:29.210 D/SST     ( 2185): [0] Poll ServiceState done:  oldSS=[{mVoiceRegState=0(IN_SERVICE), mDataRegState=1(OUT_OF_SERVICE), mChannelNumber=38950, duplexMode()=0, mCellBandwidths=[], mVoiceOperatorAlphaLong=CMCC, mVoiceOperatorAlphaShort=CMCC, mDataOperatorAlphaLong=CMCC, mDataOperatorAlphaShort=CMCC, isManualNetworkSelection=false(automatic), getRilVoiceRadioTechnology=14(LTE), getRilDataRadioTechnology=0(Unknown), mCssIndicator=unsupported, mNetworkId=-1, mSystemId=-1, mCdmaRoamingIndicator=-1, mCdmaDefaultRoamingIndicator=-1, mIsEmergencyOnly=false, isUsingCarrierAggregation=false, mLteEarfcnRsrpBoost=0, mNetworkRegistrationInfos=[NetworkRegistrationInfo{ domain=PS transportType=WWAN registrationState=NOT_REG_OR_SEARCHING roamingType=NOT_ROAMING accessNetworkTechnology=UNKNOWN rejectCause=0 emergencyEnabled=false availableServices=[] cellIdentity=null voiceSpecificInfo=null dataSpecificInfo=android.telephony.DataSpecificRegistrationInfo :{ maxDataCalls = 20 isDcNrRestricted = false isNrAvailable = false isEnDcAvailable = false LteVopsSupportInfo :  mVopsSupport = 1 mEmcBearerSupport = 1 mIsUsingCarrierAggregation = false } nrState=NONE}, NetworkRegistrationInfo{ domain=CS transportType=WWAN registrationState=HOME roamingType=NOT_ROAMING accessNetworkTechnology=LTE rejectCause=0 emergencyEnabled=false availableServices=[VOICE,SMS,VIDEO] cellIdentity=CellIdentityLte:{ mCi=21765889 mPci=89 mTac=4421 mEarfcn=38950 mBandwidth=2147483647 mMcc=460 mMnc=00 mAlphaLong=CMCC mAlphaShort=CMCC} voiceSpecificInfo=VoiceSpecificRegistrationInfo { mCssSupported=false mRoamingIndicator=-1 mSystemIsInPrl=-1 mDefaultRoamingIndicator=-1} dataSpecificInfo=null nrState=NONE}], mNrFrequencyRange=-1, mOperatorAlphaLongRaw=CMCC, mOperatorAlphaShortRaw=CMCC, mIsIwlanPreferred=false}] newSS=[{mVoiceRegState=0(IN_SERVICE), mDataRegState=0(IN_SERVICE), mChannelNumber=38950, duplexMode()=2, mCellBandwidths=[], mVoiceOperatorAlphaLong=CMCC, mVoiceOperatorAlphaShort=CMCC, mDataOperatorAlphaLong=CMCC, mDataOperatorAlphaShort=CMCC, isManualNetworkSelection=false(automatic), getRilVoiceRadioTechnology=14(LTE), getRilDataRadioTechnology=14(LTE), mCssIndicator=unsupported, mNetworkId=-1, mSystemId=-1, mCdmaRoamingIndicator=-1, mCdmaDefaultRoamingIndicator=-1, mIsEmergencyOnly=false, isUsingCarrierAggregation=false, mLteEarfcnRsrpBoost=0, mNetworkRegistrationInfos=[NetworkRegistrationInfo{ domain=CS transportType=WWAN registrationState=HOME roamingType=NOT_ROAMING accessNetworkTechnology=LTE rejectCause=0 emergencyEnabled=false availableServices=[VOICE,SMS,VIDEO] cellIdentity=CellIdentityLte:{ mCi=21765889 mPci=89 mTac=4421 mEarfcn=38950 mBandwidth=2147483647 mMcc=460 mMnc=00 mAlphaLong=CMCC mAlphaShort=CMCC} voiceSpecificInfo=VoiceSpecificRegistrationInfo { mCssSupported=false mRoamingIndicator=1 mSystemIsInPrl=-1 mDefaultRoamingIndicator=-1} dataSpecificInfo=null nrState=NONE}, NetworkRegistrationInfo{ domain=PS transportType=WWAN registrationState=HOME roamingType=NOT_ROAMING accessNetworkTechnology=LTE rejectCause=0 emergencyEnabled=false availableServices=[DATA] cellIdentity=CellIdentityLte:{ mCi=21765889 mPci=89 mTac=4421 mEarfcn=38950 mBandwidth=2147483647 mMcc=460 mMnc=00 mAlphaLong=CMCC mAlphaShort=CMCC} voiceSpecificInfo=null dataSpecificInfo=android.telephony.DataSpecificRegistrationInfo :{ maxDataCalls = 20 isDcNrRestricted = false isNrAvailable = false isEnDcAvailable = false LteVopsSupportInfo :  mVopsSupport = 2 mEmcBearerSupport = 3 mIsUsingCarrierAggregation = false } nrState=NONE}], mNrFrequencyRange=-1, mOperatorAlphaLongRaw=CMCC, mOperatorAlphaShortRaw=CMCC, mIsIwlanPreferred=false}] oldMaxDataCalls=20 mNewMaxDataCalls=20 oldReasonDataDenied=0 mNewReasonDataDenied=0
05-18 14:26:29.210 D/SST     ( 2185): [0] pollStateDone: hasRegistered = false hasDeregistered = false hasDataAttached = {1=true} hasDataDetached = {1=false} hasDataRegStateChanged = {1=true} hasRilVoiceRadioTechnologyChanged = false hasRilDataRadioTechnologyChanged = {1=true} hasDataTransportPreferenceChanged = false hasChanged = true hasVoiceRoamingOn = false hasVoiceRoamingOff = false hasDataRoamingOn =false hasDataRoamingOff = false hasLocationChanged = false has4gHandoff = false hasMultiApnSupport = false hasLostMultiApnSupport = false hasCssIndicatorChanged = false hasNrFrequencyRangeChanged = false hasNrStateChanged = false hasAirplaneModeOnlChanged = false
**05-18 14:26:29.347 D/QtiDCT-C( 2185): [0]onDataConnectionAttached**
05-18 14:26:29.347 D/QtiDCT-C( 2185): [0]setupDataOnAllConnectableApns: dataAttached emergency:[state=IDLE,enabled=false] mms:[state=IDLE,enabled=false] supl:[state=IDLE,enabled=false] hipri:[state=IDLE,enabled=false] dun:[state=IDLE,enabled=false] fota:[state=IDLE,enabled=false] ims:[state=IDLE,enabled=false] default:[state=IDLE,enabled=true] cbs:[state=IDLE,enabled=false]
05-18 14:26:29.347 D/QtiDCT-C( 2185): [0]isConnectable() call trySetupData
05-18 14:26:29.352 D/QtiDCT-C( 2185): [0]trySetupData for APN type default, reason: dataAttached, requestType=NORMAL. Data allowed, reason: NORMAL
05-18 14:26:29.357 D/QtiDCT-C( 2185): [0]setupData: apnContext={mApnType=default mState=IDLE mWaitingApns={[[ApnSettingV7] ä¸å›½ç§»åŠ¨ (China Mobile) GPRS, 2775, 46007, cmnet, , null, , null, null, 3, supl | hipri | default, IPV4V6, IPV4V6, true, 0, false, 0, 0, 0, 0, null, , false, 0, 0, -1, -1]} mApnSetting={null} mReason=dataAttached mDataEnabled=true mDependencyMet=true}, requestType=NORMAL
05-18 14:26:29.361 D/QtiDCT-C( 2185): [0]setupData: dc={DC-QtiDC-1: State=DcInactiveState mApnSetting=null RefCount=0 mCid=-1 mCreateTime=0 mLastastFailTime=0 mLastFailCause=0 mTag=0 mLinkProperties={LinkAddresses: [ ] DnsAddresses: [ ] Domains: null MTU: 0 Routes: [ ]} linkCapabilities=[ Transports: CELLULAR Capabilities: NOT_RESTRICTED&TRUSTED&NOT_VPN&NOT_ROAMING&NOT_CONGESTED LinkUpBandwidth>=15000Kbps LinkDnBandwidth>=30000Kbps Specifier: <0>] mRestrictedNetworkOverride=false mApnContexts={}} apnSetting=[ApnSettingV7] ä¸å›½ç§»åŠ¨ (China Mobile) GPRS, 2775, 46007, cmnet, , null, , null, null, 3, supl | hipri | default, IPV4V6, IPV4V6, true, 0, false, 0, 0, 0, 0, null, , false, 0, 0, -1, -1 gen#=105-18 14:26:29.368 D/DC-QtiDC-1( 2185): bringUp: apnContext={mApnType=default mState=CONNECTING mWaitingApns={[[ApnSettingV7] ä¸å›½ç§»åŠ¨ (China Mobile) GPRS, 2775, 46007, cmnet, , null, , null, null, 3, supl | hipri | default, IPV4V6, IPV4V6, true, 0, false, 0, 0, 0, 0, null, , false, 0, 0, -1, -1]} mApnSetting={[ApnSettingV7] ä¸å›½ç§»åŠ¨ (China Mobile) GPRS, 2775, 46007, cmnet, , null, , null, null, 3, supl | hipri | default, IPV4V6, IPV4V6, true, 0, false, 0, 0, 0, 0, null, , false, 0, 0, -1, -1} mReason=dataAttached mDataEnabled=true mDependencyMet=true} onCompletedMsg={ when=-24s962ms what=270336 obj=Pair{{mApnType=default mState=CONNECTING mWaitingApns={[[ApnSettingV7] ä¸å›½ç§»åŠ¨ (China Mobile) GPRS, 2775, 46007, cmnet, , null, , null, null, 3, supl | hipri | default, IPV4V6, IPV4V6, true, 0, false, 0, 0, 0, 0, null, , false, 0, 0, -1, -1]} mApnSetting={[ApnSettingV7] ä¸å›½ç§»åŠ¨ (China Mobile) GPRS, 2775, 46007, cmnet, , null, , null, null, 3, supl | hipri | default, IPV4V6, IPV4V6, true, 0, false, 0, 0, 0, 0, null, , false, 0, 0, -1, -1} mReason=dataAttached mDataEnabled=true mDependencyMet=true} 1} target=com.qualcomm.qti.internal.telephony.dataconnection.QtiDcTracker }
05-18 14:26:29.368 D/DC-QtiDC-1( 2185): connect: carrier='ä¸å›½ç§»åŠ¨ (China Mobile) GPRS' APN='cmnet' proxy='' port='-1'
05-18 14:26:29.378 D/DSM-C   ( 2185): setupDataCall
05-18 14:26:29.379 D/RILJ    ( 2185): [0250]> SETUP_DATA_CALL,dataRat=14,isRoaming=false,allowRoaming=false,DataProfile=-1/2/3/cmnet///0/0/0/0/true/21/2/0/0/false/true [SUB0]
05-18 14:26:29.755 D/RILJ    ( 2185): [0250]< SETUP_DATA_CALL DataCallResponse: { cause=0 retry=-1 cid=0 linkStatus=2 protocolType=2 ifname=rmnet_data1 addresses=[10.8.126.27/29] dnses=[/221.179.155.193, /221.179.155.209] gateways=[/10.8.126.28] pcscf=[] mtu=0} [SUB0]
05-18 14:26:29.755 D/DSM-C   ( 2185): onSetupDataCallComplete. resultCode = 0, response = DataCallResponse: { cause=0 retry=-1 cid=0 linkStatus=2 protocolType=2 ifname=rmnet_data1 addresses=[10.8.126.27/29] dnses=[/221.179.155.193, /221.179.155.209] gateways=[/10.8.126.28] pcscf=[] mtu=0}
05-18 14:26:29.757 D/DC-QtiDC-1( 2185): DcActivatingState: msg={what=EVENT_SETUP_DATA_CONNECTION_DONE when=-1ms obj={mTag=2 mApnContext={mApnType=default mState=CONNECTING mWaitingApns={[[ApnSettingV7] ä¸å›½ç§»åŠ¨ (China Mobile) GPRS, 2775, 46007, cmnet, , null, , null, null, 3, supl | hipri | default, IPV4V6, IPV4V6, true, 0, false, 0, 0, 0, 0, null, , false, 0, 0, -1, -1]} mApnSetting={[ApnSettingV7] ä¸å›½ç§»åŠ¨ (China Mobile) GPRS, 2775, 46007, cmnet, , null, , null, null, 3, supl | hipri | default, IPV4V6, IPV4V6, true, 0, false, 0, 0, 0, 0, null, , false, 0, 0, -1, -1} mReason=dataAttached mDataEnabled=true mDependencyMet=true} mProfileId=-1 mRat=14 mOnCompletedMsg={what=0x42000 when=-25s351ms obj=Pair{{mApnType=default mState=CONNECTING mWaitingApns={[[ApnSettingV7] ä¸å›½ç§»åŠ¨ (China Mobile) GPRS, 2775, 46007, cmnet, , null, , null, null, 3, supl | hipri | default, IPV4V6, IPV4V6, true, 0, false, 0, 0, 0, 0, null, , false, 0, 0, -1, -1]} mApnSetting={[ApnSettingV7] ä¸å›½ç§»åŠ¨ (China Mobile) GPRS, 2775, 46007, cmnet, , null, , null, null, 3, supl | hipri | default, IPV4V6, IPV4V6, true, 0, false, 0, 0, 0, 0, null, , false, 0, 0, -1, -1} mReason=dataAttached mDataEnabled=true mDependencyMet=true} 1} target=Handler (com.qualcomm.qti.internal.telephony.dataconnection.QtiDcTracker) {5996016} replyTo=null} mRequestType=NORMAL mSubId=1} target=Handler (com.android.internal.util.StateMachine$SmHandler) {9c33f6d} replyTo=null}
05-18 14:26:29.757 D/DC-QtiDC-1( 2185): onSetupConnectionCompleted: resultCode=0, response=DataCallResponse: { cause=0 retry=-1 cid=0 linkStatus=2 protocolType=2 ifname=rmnet_data1 addresses=[10.8.126.27/29] dnses=[/221.179.155.193, /221.179.155.209] gateways=[/10.8.126.28] pcscf=[] mtu=0}
05-18 14:26:29.757 D/DC-QtiDC-1( 2185): onSetupConnectionCompleted received successful DataCallResponse
05-18 14:26:29.772 D/QtiDCT-C( 2185): [0]completeConnection: successful, notify the world apnContext={mApnType=default mState=CONNECTED mWaitingApns={[[ApnSettingV7] ä¸å›½ç§»åŠ¨ (China Mobile) GPRS, 2775, 46007, cmnet, , null, , null, null, 3, supl | hipri | default, IPV4V6, IPV4V6, true, 0, false, 0, 0, 0, 0, null, , false, 0, 0, -1, -1]} mApnSetting={[ApnSettingV7] ä¸å›½ç§»åŠ¨ (China Mobile) GPRS, 2775, 46007, cmnet, , null, , null, null, 3, supl | hipri | default, IPV4V6, IPV4V6, true, 0, false, 0, 0, 0, 0, null, , false, 0, 0, -1, -1} mReason=connected mDataEnabled=true mDependencyMet=true}
05-18 14:26:29.772 D/GsmCdmaPhone( 2185): [0] getDataConnectionState apnType=default ret=CONNECTED05-18 14:26:29.776 D/ConnectivityService( 1407): registerNetworkAgent NetworkAgentInfo{ ni{[type: MOBILE[LTE], state: CONNECTED/CONNECTED, reason: connected, extra: cmnet, failover: false, available: true, roaming: false]}  network{100}  nethandle{432902426637}  lp{{InterfaceName: rmnet_data1 LinkAddresses: [ 10.8.126.27/29 ] DnsAddresses: [ /221.179.155.193,/221.179.155.209 ] Domains: null MTU: 1500 TcpBufferSizes: 524288,1048576,8388608,262144,524288,4194304 Routes: [ 0.0.0.0/0 -> 10.8.126.28 rmnet_data1,10.8.126.24/29 -> 0.0.0.0 rmnet_data1 ]}}  nc{[ Transports: CELLULAR Capabilities: SUPL&INTERNET&NOT_RESTRICTED&TRUSTED&NOT_VPN&NOT_ROAMING&FOREGROUND&NOT_CONGESTED&NOT_SUSPENDED LinkUpBandwidth>=15000Kbps LinkDnBandwidth>=30000Kbps Specifier: <1>]}  Score{10}  everValidated{false}  lastValidated{false}  created{false} lingering{false} explicitlySelected{false} acceptUnvalidated{false} everCaptivePortalDetected{false} lastCaptivePortalDetected{false} captivePortalValidationPending{false} partialConnectivity{false} acceptPartialConnectivity{false} clat{mBaseIface: null, mIface: null, mState: IDLE} }
05-18 14:26:29.780 D/QtiDCT-C( 2185): [0]onDataSetupComplete: SETUP complete type=default

主要的方法介绍：
setupData流程
DcTracker在下发setupData->DataConnection.bringUp的时候，会携带一条消息：
DctConstants.EVENT_DATA_SETUP_COMPLETE，对应DcTraker中的Handler会进行处理
onDataSetupComplete -> completeConnection ->

mPhone.notifyDataConnection(apnContext.getApnType()):最终通过TelephonyRegistry通知别的component当前有dataStateChanged,比如说statusbar上的图标显示：MobileSignalController

DataConnection.bringUp(EVENT_CONNECT:该消息在处理的时候从初始态mInactiveState translateTo mActivatingState)->connect(setupdatacall)也会携带message：
EVENT_SETUP_DATA_CONNECTION_DONE
这个消息处理在ActivatingState，主要就是将当前的状态切换到ActivateState，进入到这个状态后，主要就是创建NetworkAgent,并将其注册到ConnectvityService中。
让ConnectivityService来管理该数据连接。

二，从Settings UI打开数据开关创建默认data connection：

TelephonyManager提供了接口setDataEnabled来供UI 层打开或者关闭Mobile data from UI。
这个api最终也会调用到上述所说的trySetupData中来创建数据连接。

入口Activity：
cmp=com.android.settings/.network.telephony.MobileNetworkActivity
06-02 18:14:44.687 1404 3145 I ActivityTaskManager: START u0 {cmp=com.android.settings/.network.telephony.MobileNetworkActivity (has extras)} from uid 1000

问题：

在创建数据连接的时候是如何来筛选APN的？
DcTracker在初始化的时候会先调用initApnContexts初始化所有的APN，该过程其实也就是从config文件中读取出所有的apn信息，将其存放到队列中（mPrioritySortedApnContexts），在尝试创建数据连接的时候遍历该队列，符合条件的，发给trySetupData，然后又在trySetupData方法中，调用isDataAllowed方法做筛选，如果该方法返回false，则trySetupData失败。
isDataAllowed这个方法在根据当前数据attach的情况，SIM卡 loaded的情况，等等来做判断

所以说初始化过程中创建数据连接的apn筛选，其实经过了两次筛选。

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AndroidQ_默认数据连接的建立

默认数据连接创建

一，开机default Data建立的过程：

二，从Settings UI打开数据开关创建默认data connection：

问题：

AndroidQ_默认数据连接的建立相关推荐

最新文章

热门文章

AndroidQ_默认数据连接的建立

默认数据连接创建

一， 开机default Data建立的过程：

二， 从Settings UI打开数据开关创建默认data connection：

问题：

AndroidQ_默认数据连接的建立相关推荐

最新文章

热门文章

一，开机default Data建立的过程：

二，从Settings UI打开数据开关创建默认data connection：